Yeah I wanted to say something specific about not doing it in the city center, or do it when you're driving past fields and trees. But I kept thinking of bumming out all the folks that probably don't have such a resource available.

It's just one of those things I am lucky to have available, so I intentionally make use of it. I don't even have to work in the office every day, but it's a nice office and my very short commute has the option of being about 2/3 on a twisty country road. So it helps get me out of the house and/or awake sometimes.

Oh and back to your PSA: if you are in heavy traffic and exhaust is an even bigger issue than debris particles, remember the air recirculate function on your AC.